1、Designation:B974/B974M16Standard Specification forFree-Cutting Bismuth Brass Rod,Bar and Wire1This standard is issued under the fixed designation B974/B974M;the number immediately following the designation indicates the yearof original adoption or,in the case of revision,the year of last revision.A
2、number in parentheses indicates the year of last reapproval.A superscript epsilon()indicates an editorial change since the last revision or reapproval.1.Scope*1.1 This specification establishes the requirements for free-cutting bismuth brass rod,bar and wire of UNS Alloy No.C49250,C49260,C49265,C493
3、40,and C49345 suitable forhigh-speed screw machine work,or for general applications.1.2 Typically,product made to this specification is furnishedas straight lengths,or coils when requested.1.3 UnitsThe values stated in either SI units or inch-pound units are to be regarded separately as standard.The
4、values stated in each system may not be exact equivalents;therefore,each system shall be used independently of the other.Combining values from the two systems may result in non-conformance with the standard.1.4 This standard does not purport to address all of thesafety concerns,if any,associated wit
5、h its use.It is theresponsibility of the user of this standard to establish appro-priate safety and health practices and determine the applica-bility of regulatory limitations prior to use.2.Referenced Documents2.1 ASTM Standards:2B249/B249M Specification for General Requirements forWrought Copper a
6、nd Copper-Alloy Rod,Bar,Shapes andForgingsB250/B250M Specification for General Requirements forWrought Copper Alloy WireB846 Terminology for Copper and Copper AlloysE8/E8M Test Methods for Tension Testing of Metallic Ma-terialsE53 Test Method for Determination of Copper in UnalloyedCopper by Gravime
7、tryE54 Test Methods for Chemical Analysis of Special Brassesand Bronzes(Withdrawn 2002)3E62 Test Methods for Chemical Analysis of Copper andCopperAlloys(Photometric Methods)(Withdrawn 2010)3E92 Test Methods for Vickers Hardness and Knoop Hard-ness of Metallic MaterialsE478 Test Methods for Chemical
8、Analysis of Copper AlloysE527 Practice for Numbering Metals and Alloys in theUnified Numbering System(UNS)2.2 Other Standards:JIS H 1068:2005 Method for Determination of Bismuth inCopper and Copper Alloys4ISO 5959-1984 Copper and copper alloys determination ofbismuth content Diethyldithiocarbamate s
9、pectrometricmethod53.General Requirements3.1 The following sections of Specification B249/B249Mfor rod and bar,and B250/B250M for wire constitute a part ofthis specification:3.1.1 Terminology,3.1.2 Materials and Manufacture,3.1.3 Sampling,3.1.4 Number of Tests and Retests,3.1.5 Specimen Preparation,
10、3.1.6 Test Methods,3.1.7 Inspection,3.1.8 Certification,and3.1.9 Test Reports.3.2 In addition,when a section with a title identical to thatreferenced in 3.1 appears in this specification,it containsadditional requirements which supplement those appearing inSpecification B249/B249M for rod and bar an
11、d B250/B250Mfor wire.4.Terminology4.1 For definitions of terms related to copper and copperalloys,refer to Terminology B846.1This specification is under the jurisdiction ofASTM Committee B05 on Copperand Copper Alloys and is the direct responsibility of Subcommittee B05.02 on Rod,Bar,Wire,Shapes and
12、 Forgings.Current edition approved Oct.1,2016.Published November 2016.Originallyapproved in 2010.Last previous edition approved in 2012 as B974/B974M 12a.DOI:10.1520/B0974_B0974M-16.2For referenced ASTM standards,visit the ASTM website,www.astm.org,orcontact ASTM Customer Service at serviceastm.org.
13、For Annual Book of ASTMStandards volume information,refer to the standards Document Summary page onthe ASTM website.3The last approved version of this historical standard is referenced onwww.astm.org.4Available from Japanese StandardsAssociation(JSA),Mita MT Bldg.,3-13-12Mita,Minato-ku,Tokyo 108-007
14、3,Japan,http:/www.jsa.or.jp.5Available from International Organization for Standardization(ISO),ISOCentral Secretariat,BIBC II,Chemin de Blandonnet 8,CP 401,1214 Vernier,Geneva,Switzerland,http:/www.iso.org.*A Summary of Changes section appears at the end of this standardCopyright ASTM International
15、,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United States1 5.Ordering Information5.1 Include the following information in orders for prod-ucts:5.1.1 ASTM designation and year of issue;5.1.2 Copper UNS No.designation;5.1.3 How furnished(rod or bar in straight length,or wire inc
16、oils);5.1.4 Temper;5.1.5 Cross section(round,hexagonal,square,rectangular);5.1.6 Dimensions:diameter or distance between parallelsurfaces,width and thickness;5.1.7 How furnished:straight lengths or coils;5.1.8 Quantity:total weight or total length,or number ofpieces of each size;and5.1.9 If the product is purchased for agencies of the U.S.Government(see the Supplemental Requirements section ofSpecifications B249/B249M or B250/B250M for additionalrequirements,if specified).5.2 The following optio
